Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccad7d5e76ed9c81…

MALICIOUS

PDF

63.3 KB Created: 2020-08-06 01:59:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f8f8ed0561a1df6e96f792500fdad05 SHA-1: 284a8dfa2fbb8fb2b8281ecf89ffa4c3ab5ce14c SHA-256: ccad7d5e76ed9c810e49d01416c6cc3aac5814c737c7c35bbd31577152923bd9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=cassirer+essay+on+man+pdf', which is likely the primary malicious payload delivery mechanism. The presence of numerous other links, many hosted on Shopify, suggests a link farm designed to obscure the final destination and potentially evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=cassirer+essay+on+man+pdf
    • http://files.weststanlybaptistchurch.com/uploads/1/3/1/4/131454505/zesubavijaxuwax-rokid-bowariguza-fozunoneguze.pdf
    • http://niwil.charlesfarley.com/uploads/1/3/0/7/130775320/vibanobata-numigixiza.pdf
    • http://files.anaffairtoremember1.com/uploads/1/3/1/3/131398052/13ca112eaff9bad.pdf
    • https://cdn.shopify.com/s/files/1/0446/0858/5891/files/binary_large_object.pdf
    • https://cdn.shopify.com/s/files/1/0430/6717/9165/files/fiviwim.pdf
    • https://cdn.shopify.com/s/files/1/0432/7617/3472/files/88831217104.pdf
    • https://cdn.shopify.com/s/files/1/0437/7221/5448/files/13994483258.pdf
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/nonikobiwin.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7637/files/koxoluse.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/battistero_degli_ortodossi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7677/1224/files/hymenolepis_diminuta.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/57895402296.pdf
    • https://cdn.shopify.com/s/files/1/0438/3955/3696/files/73062251110.pdf
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/moxivosewaduv.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076e9.bin
c6acebe3750ab55c09714fa1b34f6c70ddae3ce202e1a088ffcbc34adab53285		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76E9 6588 bytes
font_01_sfnt_off00008732.bin
60a659a016bb62f51af7acf225d4f86d692b9572e12ff44dbd0306390e6266eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8732 6032 bytes
font_02_sfnt_off00009bac.bin
83dcc1139a8fcb44f6b12e89c294a7d3ef0879c3dd6eef6ac0f824ce64bf7363		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BAC 5160 bytes
font_03_sfnt_off0000ad28.bin
9dd08445e3d564579b0828614f0274c52a526ba1f7eb86cdaa8ad5a2374a0e74		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD28 9992 bytes
font_04_sfnt_off0000cf88.bin
0468e771f127d1efc5e8c1ddfbcc2a4617bb8474a3279200896187ccd8840df5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF88 18820 bytes

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